Cosmic jerk, snap and beyond

Cosmic Jerk, Snap and Beyond

We clarify the procedure for expressing the Friedmann equation in terms of directly measurable cosmological scalars constructed out of higher derivatives of the scale factor. We carry out this procedure for pure dust, Chaplygin gas and generalised Chaplygin gas energy–momentum tensors. In each case it leads to a constraint on the scalars thus giving rise to a test of General Relativity. We also...

Jerk, snap and the cosmological equation of state

Taylor expanding the cosmological equation of state around the current epoch p = p0 + κ0(ρ − ρ0) + 1 2 d2p dρ2 ∣∣∣ 0 (ρ − ρ0) + O[(ρ − ρ0)], is the simplest model one can consider that does not make any a priori restrictions on the nature of the cosmological fluid. Most popular cosmological models attempt to be ‘predictive’, in the sense that once some a priori equation of state is chosen the F...

Hypogenetic chaotic jerk flows

Cosmic rays and neutrino interactions beyond the standard model

It has been suggested that the neutrino-nucleon cross section could be enhanced by new physics beyond the electroweak scale in the center of mass frame, or above about a PeV in the nucleon rest frame. A specific implementation of this possibility is given in theories with n additional dimensions and a quantum gravity scale M ∼TeV that has recently received much attention in the literature [1] b...

Beyond Consciousness to Cosmos—Beyond Relativity and Quantum Theory to Cosmic Theory

Albert Einstein was a subjectivistic mathematical idealist. His physics consisted of mathematical models of the subject’s ideas—his sensations and measurements. Einstein’s “objective reality” was intersubjective reality—the experiences about which various observers could agree. His “causes” were mental constructs created to systematize the observers’ experiences. He modeled reality as it was ex...